MSc Biodiversity, Swedish University of Agricultural Sciences, 2001
Graduation Subjects:
Induced breeding in carp and catfish Genetic and morphological characterization of fish populations Ecology, sustainable utilization of natural resources
Supervisors:
Prof. Dr. J. van Arendonk Dr. ir. Hans Komen; Dr. ir. Henk Bovenhuis;
CoOperators:
Dr. Mahmoud Rezk
Financer:
INREF
Start date:
01 February 2002
End date:
01 February 2006
Introduction:
Fish farming environments are variable, with a wide array of resources used as external pond inputs and can be described, in terms of nutrient input, as ranging from low to high-input environments. If genotype-environment interaction is included in breeding programs it is possible, with selective breeding, to produce breeds that perform well in a range of environments. What are the conditions under which fish should be selected in order to meet the requirements of all farmers? These issues revolve around the low heritability associated with low-input environments, correlated responses to selection and the role of genotype by environment interaction.
Results:
Relatively high heritability estimates for body weight from the base population Considerable heritability estimates for cold tolerance in juveniles High effect of pond in tilpia fry rearing environment, fry can be reared effectively without the use of supplementary feeds
Articles:
1. Heritability estimates for cold tolerance in Nile tilapia, Oreochromis niloticus, juveniles (submitted to Aquaculture)
2. Harrison Charo-Karisa, Mahmoud A. Rezk, Henk Bovenhuis, and Hans Komen. 2004. Effects of Rearing Conditions on Low-Temperature Tolerance of Nile Tilapia, Oreochromis niloticus. In: Proc 6th ISTA, Philippines, September 12-16, Page 30-41.
